Itron Inc. 51ESS Internal Photos

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During normal operation, the iCon display updates the 51ESS ERT in fractional kilowatt-hour increments. 
Therefore, during normal operation, the 51ESS ERT consumption register will always match the Total 
kWh displayed on the meter. The 51ESS ERT SCM Tamper Counters (Meter Inversion and Meter 
Removal) and the IDM Counters (Meter Inversion, Meter Removal, Reverse Rotation and Power Outage) 
plus the IDM data are also stored in the ERT NOVRAM.  

To reset to zero all counters and Interval Data values from the ERT NOVRAM: 

1.  Turn off the power to the meter and wait for 60 seconds. 
2.  Remove the T-bar seal from the side of the meter. 
3.  Grasp the Meter Cover and turn it counter-clockwise until you reach a positive stop. Remove the 

meter cover.  

4.  Re-apply power to the meter 
5.  Press and hold the ERT Reset Button for three (3) consecutive seconds. 

NOTE: This button must be pressed for three consecutive seconds, otherwise, the meter must be 
powered down before another reset can be attempted successfully.  

To reset the Total kWh reading of the meter display, refer to the section “Resetting the kWh Display” in 
the Technical Manual. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This device complies with part 15 of the FCC rules.  Operation is subject to the following conditions: (1) 
This device may not cause harmful interference, and (2) this device must accept any interference 
received, including interference that may cause undesired operation." 

 

Meter Reset Button 

 ERT Reset Button 

ERT ID Label 

 ERT FCC Label